6643285 has 24 divisors (see below), whose sum is σ = 9069984. Its totient is φ = 4630080.

The previous prime is 6643283. The next prime is 6643289. The reversal of 6643285 is 5823466.

It is a happy number.

It is not a de Polignac number, because 6643285 - 2¹ = 6643283 is a prime.

It is a plaindrome in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 6643285.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6643283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 125319 + ... + 125371.

It is an arithmetic number, because the mean of its divisors is an integer number (377916).

Almost surely, 2^6643285 is an apocalyptic number.

It is an amenable number.

6643285 is a deficient number, since it is larger than the sum of its proper divisors (2426699).

6643285 is a wasteful number, since it uses less digits than its factorization.

6643285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165 (or 112 counting only the distinct ones).

The product of its digits is 34560, while the sum is 34.

The square root of 6643285 is about 2577.4570801470. The cubic root of 6643285 is about 187.9869181330.

The spelling of 6643285 in words is "six million, six hundred forty-three thousand, two hundred eighty-five".